BALANCE VS UNBALANCE FORCES

Click HERE for a great website that explains BALANCED and UNBALANCED forces

NEWTON's LAWS of MOTION

Newton's LawsIsaac Newton (1643-1727) is a British physicist known to have established the three universal laws of motion in 1688. These three laws, named Newton's laws, helped to develop the basis of classical mechanics.

Troisième loi de newton: action et réaction

Other examples of action and reaction forces: • A swimmer swimming forward: the swimmer pushes against the water (action force), the water pushes back on the swimmer (reaction force) and pushes her forward.• A ball is thrown against a wall: The ball puts a force on the wall (action force), and the wall puts a force on the ball (reaction force) so the ball bounces off.• A person is diving off a raft: The person puts a force on the raft (action force) pushing it, and the raft puts a force on the diver (reaction force) pushing them in the opposite direction.• A person pushes against a wall (action force), and the wall exerts an equal and opposite force against the person (reaction force).• The Space Shuttle engines push out hot gases (action force), and the hot gases put a force on the shuttle engines (reaction force) so the shuttle lifts (there is no sling shot doing it!)